Hello, I'm trying to dynamically select Attributes to check their values. I have an application, which puts attribute (representing Prepaid Tickets) into the Accept table. All possible TicketTypes are defined in the dictionary. Example: Ticket245-trigger-reactivation = 200 Depending on different other attributes, I have to check this attribute. In /sites-available/default I have the following Lines 1. to select the TicketType: If (.....){ update control { TicketType := "Ticket245" } } and then to evaluate TicetType specific Attributes... if ("reply:%{control:TicketType}-trigger-reactivation" != ""){ do something } This will evaluate to true forever because it is not empty... "reply:Ticket245-trigger-reactivation" != "" If I change this to If ("%{reply:%{control:TicketType}-trigger-reactivation}"!= ""){ do something } It evaluates to False: ++? if ("%{reply:%{control:TicketType}-trigger-reactivation}" != "") expand: %{reply:%{control:TicketType}-trigger-reactivation} -> Why does it not expand the %{control:TicketType} to Ticket245 in this situation? If I omit the outer "": if (%{reply:%{control:TicketType}-trigger-reactivation} != ""){ do something } I will get this error while loading the configuration: Bare %{...} is invalid in condition at: %{reply:%{control:VolumeBucket}-trigger-reactivation}) How may I dynamically select Attributes to check for? Thanks for a hint. Regards Stefan